Comments on: VC-1/WMV9 on Mac OS X/PowerPC

By: Banana

Banana — Mon, 15 May 2006 07:31:59 +0000

argh!
I can understand nearly all the instructions, just a few little bits I don’t understand!

“edit libavcodec/vc9.c, go the very end of the file, and add #if 0/#endif around the wmv3_decoder AVCodec structure; this will keep it from conflicting with the new SMPTE WMV3 decoder” I couldn’t understand this, so I just commented out the wmv3_decoder stuff with a /* stuff */

it all works good, starts compiling, but errors out at “cc -Wl,-dynamic,-search_paths_first -g -o ffmpeg_g ffmpeg.o cmdutils.o -L./libavcodec/libvc1 -lvc1 -L./libavformat -lavformat -L./libavcodec -lavcodec(BUILDSUF) -L./libavutil -lavutil -lz
/bin/sh: -c: line 1: syntax error near unexpected token `(’
/bin/sh: -c: line 1: `cc -Wl,-dynamic,-search_paths_first -g -o ffmpeg_g ffmpeg.o cmdutils.o -L./libavcodec/libvc1 -lvc1 -L./libavformat -lavformat -L./libavcodec -lavcodec(BUILDSUF) -L./libavutil -lavutil -lz ‘”

can anyone help?

Thanks

By: Jon

Jon — Tue, 07 Mar 2006 11:35:21 +0000

a, I’m not exactly sure of the implementation details, but certainly on x86, the .dll files that contain Windows Media decoders from windows should be able to be called from mplayer like they can on Linux and Windows. Whether additional work is required to make this work on OS X, or whether it will work with a plain build would be something interesting to see.

By: a

Tue, 07 Mar 2006 10:55:31 +0000

With the advent of the x86 Intel Mac, its possible that no solution could have emerged before the whole situation became a non issue, as .dll hooking will work on the new Intel Macs, allowing them to play back these kinds of streams.

Sorry, am not terribly savvy. Does that mean that I could then simply install, say, MPlayer or VLC (without having to compile it myself, find codecs, etc) and be able to view wmv9 video?

By: Luca

Luca — Fri, 24 Feb 2006 09:11:32 +0000

Hi,

I could successfully make it work ;-)… “Use the source, Luke”… it was an easy fix, afterall.

Now I have an issue: you say that you could re-encode the files with a different codec. I have done it with the XVID one, but the files I obtain take 100% of my CPU and mplayer can’t play them. I have tried many options (1 pass encoding, 2 pass encoding, fixed bitrate…) but I always get the same results. I know this is not a mencoder forum (I already tried them, btw…) but could you share the settings you used to re-encode the files? That shouldn’t violate any law.

If you could do it, I’d greately appreciate it.

Thanks!

By: Jon

Jon — Tue, 07 Feb 2006 14:42:07 +0000

I’ve purposely avoided detailing the exact step by step process I used to use the SMPTE VC-1 with mplayer, because I’m not really sure about the legal issues surrounding the use of the VC-1 code.

I’ll see what I can do about getting together a few pointers or something that can at lesat point you guys in the right direction.

By: Luca

Luca — Tue, 07 Feb 2006 11:40:13 +0000

Hi, how did you make it work for you? I followed your instructions to build mplayer from cvs and it works fine, but I cannot add wmv3 support. Compilation goes fine, but no playback.
Thinking I could have done something wrong, I then tried building ffmpeg itself, but again I get no errors and no decoder.

When I run “./ffmpeg -formats | grep wmv3″ I get this (empty) output:
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
configuration:
libavutil version: 49.0.0
libavcodec version: 51.1.0
libavformat version: 50.0.0
built on Feb 7 2006 12:24:08, gcc: 4.0.1 (Apple Computer, Inc. build 5250)

Is there something which must be done that is not mentioned in the other blog?

Thank you

By: fred

fred — Tue, 03 Jan 2006 04:24:36 +0000

The link above lists instructions for modifying the build of ffmpeg; it’s a little unclear how to modify the mplayer cvs build as detailed in your next post to include this patch….